I particularly love how easy this is to set up emails for my clients' contact lists - just enter their names into an excel spreadsheet (which we have done) or upload them from our contacts page in Gmail/Facebook etc., then copy & paste each e mail address onto kerjmail using a simple CSV file; very time saving compared to other providers of course! We've been able use this since November 2016 when they launched which was good because there were no previous trials so couldn't find out if any problems would occur beforehand.
Easy process but not as intuitively user friendly than some others perhaps? There are plenty more options available within different sections such as newsletters etcetera though. Emailing new customers quickly without having too many details filled out at one go plus being able to edit later once all has settled down again.